Unable to get elements from scroll window

I encounter a difficulties testing my GUI. I have a window with elements witch I get by code side using selenium xpaths or ids. There are a lot of them so of course a window is scrollable. The problem occures when i try to get elements that are not visible in window (the ones that we see only when when we scroll). All of these "under the scroll" elements are unable to be fetched.

Does know maybe how to get that elements? I would be grateful for any help :)